Question about 1984 Mazda RX-7

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Have to keep engine choked for car to run - 1984 Mazda RX-7

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Possibly bad fuel pump, plugged fuel filter, dirt in carb, plugged main jet, vacuum leaks, check fuel flow at carb inlet, if good, go on to carb itself , remove carb from engine, take to work surface, disassemble carb,clean all parts with carb cleaner and a soft bristle brush, make sure all jets are clear, blow out with air if you can, reassemble carb, put back on motor, attach linkage, fuel line, try engine, luck

Posted on Feb 01, 2010

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Posted on Jan 02, 2017

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Why does ford use coolant in throttle body on 1998 ranger 2.5l engine?


I think it has something to do with the automatic choke. The Auto choke can sense what temperature the water (coolant) is. As the water gets hotter, the choke opens up more until its reached operating temperature. Once this has occurred, the choke will be off.(The butterfly valve fully open) This type of choke keeps the engine running smoother until its reached its correct operating temperature.

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1991 F350 w/460 cu starts but runs rough until warm.


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Sputters and dies on cold start, significant drop in gas mileage.


You need to rebuild the carburetor or clean the choke linkage and make sure the choke valve closes cold.

Nov 12, 2013 | 1985 Isuzu Pickup

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Carbeurator problems


Cold starting problems from a carbureted engine? Bet if you get your choke adjusted right, it will solve it. If you can screech the tires, this Tercel may be worth saving!
Just get a mechanic friend or pay someone to fix the choke. Doesn't take a long time if you know how. If you've never adjusted or worked on one, it's not so fun. Hard to explain too. The choke plate or flap should be almost closed completely when starting. Soon as engine is cranked or running, the plate should open a small amount more, but still nearly closed. Then as engine warms, the plate should gradually open until it is completely open after about 5-10 minutes. The choke cuts off the air supply to the engine. A cold engine needs a richer gas mixture to run good, and most importantly to start easy.

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I have a 1987 dodge ram 50, it has a 2 barrel carb... i cant keep it running i think it is the carburetor because if i wire the choke down it will kinda run, but as soon as the choke is let off it cuts...


The choke is there to cut off the air supply and pull in more fuel when it is cold. You have to repair the choke or put a manual choke on it. the warmer the engine gets , the more the choke opens up.

Feb 11, 2011 | 1987 Dodge Ram 50

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Won't start when cold


hello wyatt...... Is your jag.built with a carburetor or fuel injected?
Carb, your choke is not set to close when cold, and should be set. When set, it also sets a cam that keeps the engine running fast. Then when warm, you hit the pedal and the cam moves, and the engine speed goes to normal. Unless the choke is set, the engine cannot keep running, as it tries to run on cold gas and it can't run good on cold gas. It needs more gas, therefore, and the choke makes more gas go into the engine.

Fuel Injected, the computer should adjust the amount of gas your car is getting when cold. If not, the coolant sensor might be bad.
The coolant sensor senses the cold engine and tells the computer to add more gas. Once the engine is warm, the coolant sensor tells the computer to put the gas to normal.
So, if the sensor is not working, the engine will try to run normal, and if cold, it can't. Joe Thanks for choosing Fixya!

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1 Answer

What could be wrong if the engine will not idol?it will run right first thing in the morning but 3minutes later if u don't keep your foot on the gas&brake at a light the engine will shut off. is their...


it just needs the tick over turned up a bit on first start up its still running on choke,,, fast tick over,,,
when the choke comes off it starts to stall on you,,, yes?
the tick over should be set at 750 - 850 rpm (in gear when hot) when makeing any ajustments to the tick over keep the hand brake and foot brake hard on,,,

Oct 30, 2009 | 1990 Ford F150

1 Answer

Blazer rumbling,choking,missing in engine


Check the fuel pressure regulator. generally "failure" position is full open which will richen up the fuel mixture. also check vacuum line to the regulator for cracks and good connection.

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1 Answer

1993 oldsmobile cutlass supreme engine stalls choking


soundl like idle air control valve sensor
try a clean .............if no better replace

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1991 Toyota 4x4, 4 cyl. engine. Surges when coolant level is low, even though it has not yet heated up.


your carb has a coolant heated choke system if i am correct as car warms up the coolant warms the choke spring. keep full of coolant to keep from other damage

Aug 20, 2008 | 2004 Toyota Corolla

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